which culture used incas number counting system and when?how it works?what do they count with?how was it discovered?is this method still used now?

which culture used incas number counting system and when?how it works?what do they count with?how was it discovered?is this method still used now? Which website can learn Chinese?I am very interested in Chinese culture. I like the classroom where I used to study I like the classroom which I used to study inI like the classroom I used to study in I like the classroom in which I used to study 这四句都对吗 女朋友说Sorry,I have been used to the things which I'm not supposed to. sorry,i have been used to the tings which i'm 英语达人速度The house which I used to live in has disappeared.The house in which I used to live has disappeared.两句话有什么区别?which与in which 有什么区别? 5.This is the second school ____ I used to work at.填that 还是which? i like the please where i used to live in. i like the please which i used to live in 对不对?i like the house which i use to live in对不对? I ______ in the house which ______ books and magazines.A．am used to live；used to keepiI ______ in the house which ______ books and magazines.A．am used to live；used to keepingB．used to live；has been used to keepingC．have been used to liv Culture culture culture culture I like the house ___ I used to live ____.A.which,in B.where ,in 选哪个,为什么? I used to live in China when I was a kid,which was my best and precious memory. 28.I used to in the house which to keep books and magazines.这里要选哪一个A.living; used B.live; was usedC.live; used D.living; was used是要选A还是D,为什么? My father and I used to have a lot of conversation through which I learned lessons from his life.这里through which 可以用where替换么 my father and i used to have a lot of conversations through which i learned lessons from hisexperience翻译句子,through which怎么解释?做什么成份?